Abstract: A type of one-piece microswitch with built-in resistor(s) having a switch casing, a button on the switch casing, with a pedestal located in the casing, a common terminal, a first terminal and a second terminal installed for connection to external circuits with the common terminal electrically connected to the first contact, the first and the second terminals electrically connected to the second contact respectively. The common terminal is connected to the first and/or second terminal via one or more resistors with a switching device used for switchover of connection or disconnection between the first and the second contacts. The button and pedestal are connected by a spring piece or spring. The switching device is installed on the button, which constitutes a linkage with the button.